Technical requirements for polyurethane insulation board
Bulk density range: (40-60kg/m3); Length range: (0.5m-4m); Width range: (0.5m-1.2m); Thickness range: (20mm-200mm). The cutting precision is high, and the thickness error is 0.5 mm, which ensures the flatness of the finished product surface. The foam is fine and uniform. Light bulk density can reduce the dead weight of finished products, which is 30-60% lower than that of traditional products. High compressive strength, and can withstand great pressure in the process of manufacturing finished products. It is convenient for quality inspection, because the surrounding epidermis is removed in the cutting process, the quality of the plate is clear at a glance, and the heat preservation effect of the finished product is guaranteed.
Characteristics of polyurethane insulation board
1, rigid polyurethane has low thermal conductivity and good thermal performance. When the density of rigid polyurethane is 35 ~ 40kg/m3, the thermal conductivity is only 0.0 18~0.024w/(m.k), which is about half of that of EPS, and the thermal conductivity is the lowest among all thermal insulation materials at present.
2. Rigid polyurethane is moisture-proof and waterproof. The closed-cell ratio of rigid polyurethane is above 90%, which is a hydrophobic material, and the thermal conductivity will not increase due to moisture absorption, and the wall will not leak.
3. Rigid polyurethane is fireproof, flame retardant and high temperature resistant. After adding flame retardant, polyurethane is a kind of flame retardant and self-extinguishing material, its softening point can reach above 250 degrees Celsius, and it will only decompose at higher temperature. In addition, when polyurethane burns, it will form carbon deposits on the surface of its foam, which will help to isolate the foam below. Can effectively prevent the flame from spreading. Moreover, polyurethane will not produce harmful gas at high temperature.
4. polyurethane board has excellent thermal insulation performance, which can reduce the thickness of building envelope and increase the indoor usable area while meeting the same thermal insulation requirements.
5, the deformation resistance is strong, it is not easy to crack, and the facing is stable and safe.
Wanhua rigid foam polyurethane composite insulation board went to the seaside alone.
According to the release of the State Council Development Research Center, more than 95% of new buildings are still high-energy buildings. Because the thermal insulation performance of building envelope in China is generally low, the thermal conductivity of exterior walls and windows is three to four times that of developed countries. According to the calculation of relevant departments, the energy loss of houses and houses is about 50% of the wall. Roof accounts for about10%; Doors and windows account for about 25%; Basement and ground account for about 15%. In order to achieve 50% energy-saving rate of buildings in China in 20 10, it is necessary to completely transform the external walls of buildings, and the market for wall insulation materials will greatly increase.
Wanhua is the only enterprise in China with independent intellectual property rights of polyurethane raw material MDI production technology, and it is the leader of domestic polyurethane industry. Wanhua Energy Saving is a company specialized in producing, R&D and selling polyurethane building energy saving products under Wanhua. Wanhua rigid foam polyurethane composite insulation board introduced by the company in this exhibition can not only bring people low-cost housing, but also bring standardization, industrialization and simple operation to construction enterprises. Its construction efficiency is several times higher than other insulation construction methods, which will greatly promote the national energy conservation and emission reduction and green environmental protection strategy.